使用流体腔选截面的时候一直出现这种问题

nanjibingren

waring：THE SURFACE ASSEMBLY_PART-1-1_CAV_LOW IS NOT COMPLETELY ENCLOSED.   A LIST OF ELEMENT WITH FREE EDGES ON THIS SURFACE IS GIVEN AS FOLLOWS:
ERROR: SURFACE ASSEMBLY HAS FACETS THAT ARE NOT ORIENTED PROPERLY WITH
           RESPECT TO EACH OTHER. CHECK THE ELEMENT CONNECTIVITIES FOR
           UNDERLYING ELEMENTS 1 INSTANCE PART-1-1 AND 9462 INSTANCE PART-1-1
           (SHARING THE COMMON EDGE WHOSE END POINTS ARE NODES 1 INSTANCE
           PART-1-1 AND 5 INSTANCE PART-1-1), AS WELL AS THE *SURFACE DATA
           CARDS TO ENSURE THAT THE SURFACE NORMALS ARE CONSISTENT. THIS
           MESSAGE WILL NOT BE REPEATED FOR OTHER FACETS ON THIS SURFACE WITH
           SIMILAR PROBLEM.
并且划分网格时还出现附件所示的那样
C:\Users\yyz\Desktop

asdaaa

法向问题。Q:1917665644